What Does g Represent in the Fluid Mechanics Equation P = Patm + pgh?

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SUMMARY

The discussion clarifies the meaning of "g" in the fluid mechanics equation P = Patm + pgh, confirming it represents gravitational acceleration at 9.81 m/s². Participants also confirm that "V" in the buoyancy force equation F_b = pVg refers to volume, essential for calculating the submerged portion of an object in fluid. The variable "p" is identified as density (ρ), not momentum. This conversation emphasizes the importance of understanding these fundamental concepts in fluid mechanics.

PREREQUISITES
  • Understanding of fluid mechanics principles
  • Familiarity with basic physics equations
  • Knowledge of gravitational acceleration (9.81 m/s²)
  • Concept of buoyancy and density (ρ)
NEXT STEPS
  • Study the principles of buoyancy and Archimedes' principle
  • Learn about fluid statics and hydrostatic pressure calculations
  • Explore the relationship between density and buoyancy in different fluids
  • Review introductory physics resources on fluid mechanics equations
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Students studying physics, particularly those focusing on fluid mechanics, as well as educators and anyone seeking to deepen their understanding of buoyancy and fluid behavior in various contexts.

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In the equation

P = P *sub*atm + pgh

what is the "g"?

gravity due to earth??
 
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Yes, it is the gravitational acceleration experienced by the fluid (9.81 m/s^2 towards the ground).
 
Last edited:
THANK YOU SOO MUCH!
now i can finish my problem.

one more though...

in this equation for fluid mechanics...

F*sub*b = pVg

Is the V for volume? because I'm given the dimensions of a box floating on water and I have to figure out how much of it is under water
 
Having not done fluid mechanics the F_b may indicate to me the buoyancy or something? Maybe V is viscosity?

Is your p for momentum, or really a rho, for density? if so, the RHS of your equation can become mg, if v is volume.

But yea, really, this should be in Introductory Physics or something, not precalc math. And why does your title refer to arildno, he's not the only person who tries to help you know :P
 
V is most likely volume, so that Fb is the buoyancy force.
In the future, please do not refer to specific members in your title.
 

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